Childcraft - How and Why educational encyclopedia books. Dated 1987. Dictionary is dated 1989.
Includes:
1 - Once Upon a Time
2 - Time to Read
4 - World and Space
6 - The Green Kingdom
7 - How Things Work
10 - Places to Know
12 - Look and Learn
13 - Mathemagic
14 - About Me
15 - Guide for Parents